1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/* vi: set sw=4 ts=4: */
/*
* sigsuspend() for uClibc
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
#ifdef __USE_POSIX
#include <signal.h>
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
# ifndef __NR_rt_sigsuspend
# error break build, NPTL needs rt_sigsuspend syscall
# endif
# include <sysdep-cancel.h>
#else
# define SINGLE_THREAD_P 1
#endif
#ifdef __NR_rt_sigsuspend
static _syscall2(int, rt_sigsuspend, const sigset_t *, set, size_t, size)
/* Change the set of blocked signals to SET,
wait until a signal arrives, and restore the set of blocked signals. */
int sigsuspend(const sigset_t *set)
{
if (SINGLE_THREAD_P)
return rt_sigsuspend(set, _NSIG / 8);
# ifdef __UCLIBC_HAS_THREADS_NATIVE__
int oldtype = LIBC_CANCEL_ASYNC ();
int result = rt_sigsuspend(set, _NSIG / 8);
LIBC_CANCEL_RESET (oldtype);
return result;
# endif
}
#else
# define __NR___syscall_sigsuspend __NR_sigsuspend
static __always_inline _syscall3(int, __syscall_sigsuspend, int, a, unsigned long int, b,
unsigned long int, c)
int sigsuspend(const sigset_t *set)
{
return __syscall_sigsuspend(0, 0, set->__val[0]);
}
#endif
libc_hidden_def(sigsuspend)
#endif
|
